CVE-2024-56156: Halo

Critical severity, CVSS 9.0. EPSS: 0.8% chance of exploitation in the next 30 days.

Halo is an open source website building tool. Prior to version 2.20.13, a vulnerability in Halo allows attackers to bypass file type validation controls. This bypass enables the upload of malicious files including executables and HTML files, which can lead to stored cross-site scripting attacks and potential remote code execution under certain circumstances. This issue has been patched in version 2.20.13.

Affected products

• Halo Halo: before 2.20.13 (fixed in 2.20.13)

Published 2025-04-25. Last modified 2026-06-17.